TEMPO-media oxidation combined with laccase for effective degumming pretreatment of hemp fibers

Abstract

TEMPO-media oxidation and laccase have been successfully used in fiber degumming, but the combination of the two methods in the hemp degumming process has not yet been reported. In this paper, an alternative and efficient way for the pretreatment of hemp degumming was proposed as a combination of TEMPO-media oxidation with laccase and was a TEMPO-laccase system. A chemical composition analysis, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were applied to systematically analyze and compare the degumming efficiency between the TEMPO-laccase system and other pretreatments. The results showed that after the TEMPO-laccase system degumming process, a clean and smooth surface of the degummed fibers could be observed and the non-cellulosic materials were greatly removed without any crystalline transformation. The hemp fibers after the TEMPO-laccase system degumming process had the most desirable linear density of 6.64 dtex and a tenacity value of 3.41 cN/dtex. This new pretreatment had a considerable effect on hemp degumming, which holds promise for use of high-value textiles.

The physical and chemical properties of hemp fiber prepared by alkaline pectinase–xylanase system

“…Hemp in the individual fiber state is unsuitable for spinning due to its low strength and short length (12-25 mm), which limited its further application (Liu et al 2017). Researchers have proposed that part of the gum compositions should been retained to link single fiber as a technical fiber, which can get a certain length of the fiber bundle and be capable of spinning (Sadrmanesh et al 2019).…”

Influence of single gummy component removal/retention on the physicochemical properties of fibrilia fiber and the reaction behavior of the other components in the degumming process

“…13,14 Successful degumming technology requires the removal of the gummy materials to a proper level, namely, improving the fineness and hand feeling of fiber by removing excessive gummy materials without causing much damage to the degree of polymerization (DP) value or the tenacity of the fiber. 1,[15][16][17] Researchers have devoted many efforts to developing excellent degumming methods, and several typical degumming methods have been established. Zhang et al 4 conducted flax SFT semi-degumming with gas phase ozone treatment, and prepared flax fiber with about 10 cN and a DP value of about 800.…”